Mailbox indicator flag



FIG. 1 is a perspective view of a mailbox indicator flag showing the present design;

FIG. 2 is a first side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a second side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a mailbox indicator flag, substantially as shown and described. 